graphite | Stone Crusher used for Ore Beneficiation ...
Jan 24, 2012· Jan 24, 2012· Graphite. Graphite is a dark gray to black mineral with a metallic luster, it has relatively low hardness(0.5-1 in Mohs). However, because of graphite's often occurrence as flakes and the covalent bonds strength within the sheet-like graphene, it is very hard to grind graphite to fine …
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